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3G Training
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oTerminologieso 3G Introduction and overviewo 3G Structure and Processo
3G Power Controlo 3G Mobility Managemento 3G Call Process Managemento 3G Radio Interface Channelo 3G Handovero 3G !timi"ation Conce!t
Content
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Terminologies
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Symbol Explanation - 1
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Symbol Explanation - 2
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Symbol Explanation - 3
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Symbol Explanation - 4
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Symbol Explanation - 5
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Symbol Explanation - 6
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RTWP
RT#P can be caused by bad weather$feeder bro%en$ !ort feeder bro%en
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Symbol Explanation -
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Time Propagation !TP"
TP use for chec%ing overshoot sites & unit TP e'uals to (3)m in distance
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3G #ntro$%&tion an$
'(er(ie)
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Reason *or $e(eloping3G Increase Ca!acity *evelo!ment Rate of mobile comm *emands on Multimedia
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+i,eren&e bet)een WC+. an$GS GS
WC+.+do!ts cellular networ% structure
and fre'uency !lanning to guarantee
intra,inter-fre'uency interference
.sers su!!orted can be calculated
from carriers and timeslots if the
interference meets the re'uirements/
Provides voice service
Reali"e &0& fre'uency reuse
The ca!acity !er #C*M+ cell is
1soft2 for it is related to environment
and neighbor cell interference/
Su!!orts multi!le services with
dierent s!eed rate and 4oS$ and
each service has dierent coverage
range/
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WC+. ST./+.R+E0'T#'/
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Page &5
Tra& &annels$i,erent %sers areassigne$ %ni%e &o$ean$ transmitte$ o(erte same 7re%en&yban$8 7or example8WC+. an$ C+.2999
Tra& &annels $i,erent 7re%en&yban$s are allo&ate$ to $i,erent%sers
Tra&&annels $i,erent timeslots are allo&ate$ to $i,erent%sers8 7or example
*re6%e
n&y
Time
Po)er
*re6%
en&y
Time
Po)er
*re6
%en&y
Time
Po)er
*+.
T+.
C+.
2ser
2ser
2ser
2ser
2ser
2ser
%ltiple.&&essTe&nologyan$+%plexTe&nology
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3G So7t Capa&ity
Ca!acity Coverage 4oS
6they will give aect to each other7
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3G Capa&ity
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Page (8
:oS Type
Re
al-
tim
e
cat
eg
ory
Conversation
al
It is necessary to maintain the time relationshi!
between the information entities in the stream/
Small time delay tolerance$ re'uiring data rate
symmetry
9oice service$
video!hone
Streaming
Ty!ically unidirectional services$ high
re'uirements on error tolerance$ high
re'uirements on data rate
Streaming
multimedia
:o
n
rea
l-
time
Interactive
Re'uest-res!onse mode$ data integrity must be
maintained/ High re'uirements on error
tolerance$ low re'uirements on time delay
tolerance
#eb !age
browse$
networ% game
*ata integrity should be maintained/ Small delay
restriction$ re'uiring correct transmission
;ac%ground
download of
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3G Str%&t%re an$
Pro&ess
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Page ((
TS /et)or;
Iu-;C
R:C
R:C
:ode;
:ode;
:ode;
CS Service toMSC
PS Service toSGSN=>GGSN
.< .TR+: C:
.u Iu
Iu-CS
Iu-PS
Iur
Iub
Iub
Iub
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3G pro&essing +atatransmit
Source Coding
Channel Coding
S!reading
Scrambling Modulation
Transmit
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So%r&e &o$ing
Increase T= ciency +nalog to *igital Converter Performed in .< PS no need source coding/ #hy?
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&annel &o$ing
Ma%e T= More Reliable by !ut moreredundant bits
.se for overcoming
Interference,@ading .se Interleaving for serious fading
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sprea$ing
Increase the Ca!ability to vercomeInterference
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s&rambling
Ma%e T= more secureA
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mo$%lation
*igital to signal converter
B is wave-length
#ave-length aecting antenna dimension
The more high fre' 6f7$ antenna dimensionwill be smaller
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Te Wole Pro&ess
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3G Po)er Control
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te
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Wy po)er &ontrol
T= !ower cannot be set to be as high as !ossible/It will waste the !ower and #ill cause e=trainterference to other users/
In #C*M+ system$
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po)er &ontrol Type
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3G obility
anagement
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obility anagement
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#$le mo$e
.TR+: doesnDt %now anything about .< butCR< %nows +C,R+C of .c volume is high7
Paging only sent to this cell
CellF@+CH 6&88 m+ &8 m+7 RRC Connection active
.TR+: allocated Common Channel .se for signalling with PS service 6ow data Rate$ Tra>c volume is not too high7
CellFPCH
RRC Connection active
.< connected but no data transmit
.< only monitor PICH
.R+FPCH .R+ .TR+: Registration +rea Change state from CellFPCH to CellF@+CH 6cell u!date7 that ha!!ens too fast
.R+ deJned from several dierent of :ode;s/
There is a threshold timer to decide the state changes from CellFPCH to CellF@+CH6if cellFPCH ha!!ens for = time$ then change to .R+FPCH7
#hy have to change to .R+FPCH? because too many changes from CellFPCH to CellF@+CH are not good for system ca!acity
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3G Call Pro&ess
anagement
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RRC Conne&tion
R+; Release will trigger Iu Release
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3G ra$io inter7a&e&annel
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a>or Cannel
ogical Channel Control Channel
Service Channel 6Tra>c7
Trans!ort Channel *edicated Channel
Common Channel
Physical Channel
.,* Physical Channel *edicated carrier !hase
code 69S@$ SC7
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Cannel example - 1
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Cannel example - 2
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Pysi&al &annel
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Pysi&al &annel
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+ Pysi&al &annel
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3G ra$io inter7a&eproto&ol
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#nter7a&e proto&ol
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mts proto&ol
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mts proto&ol type
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R/ ? .ppli&ation proto&ol
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3G @an$o(er
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@an$o(er
Intra-@re'uency 6SH7 Soft H
Softer H
Hard H
Inter-@re'uency 6I@H7 Inter-R+T @re'uency 6IR+TH,ISH7
3G to *CS
3G to GSM
So7t @an$o(er ?
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So7t @an$o(er ?!Conne&tion be7ore
+is&onne&tion"R/C/o$e
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So7ter @an$o(er ? !.Spe&ial Case o7 So7t
@an$o(er" R/C/o$e